U.S. Marines with 3rd Battalion, 5th Regiment and the Afghan National Army provide cover as they move out of a dangerous area after taking enemy sniper fire during a security patrol in Sangin, Afghanistan, in November 2010. During its seven-month deployment, the 3/5 sustained the highest casualty rate of any Marine unit during the Afghan war, losing 25 men.

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Cpl. David R. Hernandez/U.S. Marine Corps

An Afghan Hell On Earth For 'Darkhorse' Marines

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Lt. Col. Jason Morris pays his respects at a memorial service in Sangin, Afghanistan, on Nov. 26, 2010, for three Marines who were killed: Lance Cpl. Brandon Pearson, Lance Cpl. Matthew Broehm and 1st Lt. Robert Kelly. Morris commanded a battalion in volatile Helmand province that suffered the highest casualty rate of any Marine unit in the Afghanistan War.

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Afghan Success Comes At High Price For Commander

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Phil Pressel designed cameras for the government's top-secret Hexagon project. He's only recently been able to speak about his life's work.

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Spy Satellite Engineer's Top Secret Is Revealed

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This undated photo provided by the National Nuclear Security Administration shows the last B53 nuclear bomb. It was dismantled this past week, just outside Amarillo, Texas. It's a milestone in efforts to reduce the number of nuclear weapons.

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U.S. Dismantles The Biggest Of Its Cold War Nukes

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Gay Service Members Challenge DOMA

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Terrorism Defendant Argues Free Speech Defense

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In Boston Terrorism Trial, A Free Speech Defense

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Protesters hold up signs outside of Federal Hall during a demonstration against then-U.S. Attorney General John Ashcroft in 2003 in New York City.

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As It Turns 10, Patriot Act Remains Controversial

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Republican Sen. Lindsey Graham of South Carolina has criticized the Obama administration's stance on the detainee policy in the defense bill.

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Big Fight Brewing In Senate Over Defense Policy Bill

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First Black Marines Receive Highest Civilian Honor

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Cold War Bomb To Be Dismantled

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This image released by the SITE Intelligence Group on April 27, 2011, shows Thierry Dol, one of four French hostages held by al-Qaida's North Africa affiliate. U.S. counterterrorism officials are concerned that al-Qaida affiliates in Africa are growing stronger.

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U.S. Worries Grow Over Al-Qaida's African Presence

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A drop house raid yielded several suspected illegal immigrants on April 29, 2010, in Phoenix. Northwestern University political science professor Jacqueline Stevens says some of the nearly 400,000 people deported during the past fiscal year weren't illegal immigrants.

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In The Rush To Deport, Expelling U.S. Citizens

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A U.S. Marine Osprey at Camp Leatherneck in southern Afghanistan. The aircraft suffered multiple problems when it was being developed, but is now getting praise from those flying it.

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The Osprey: Good Reviews, But A Costly Program

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Lance Cpl. Dakota Hicks, from Laharpe, Ill., connects a radio battery to a portable solar panel system in Sangin District, Afghanistan.

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U.S. Military Boosts Clean Energy, With Startup Help

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